Apparatus for manufacturing cement.



No. 825,305. PATENTED JULY 10, 1906. C. ELLIS. APPARATUS FOR MANUFACTURING CEMENT.

APPLICATION FILED MAY 5. 1905.

.HLIIIL WITNESSES:

fran Vsfra'rns ,arnn'r ernten.

CARLETON ELLIS, OF NEW YORK,V N. Y., ASSIGNOR TO OOMBUSTION UTILITIES COMPANY, OF NEW-YORK, N. Y., A CORPORATION OF New Yoan.

APPARATUS FOR MANUFACTURING GEMENT,

Specification of Letters Patent.

Patented July 10, 1906.

Application iiled May 5, 1905. Serial No. 259,088.

To @ZZ whom it inc/y' concern: y

Be it known that I, OARLETON ELLIS, a citizen of the United. States, and a resident of New-York city, in the county of New York and State of New York, have invented oertain new and useful Improvements in Apparatus for Manufacturing Cement, of which the following is a specification.

This invention relates to apparatus for the regeneration of the heat now lost in the stackgases of the kiln used in the manufacture of Portland cement. Efforts havebeen made to use certain devices for this purpose; but their construction has been such that satisfactory results have not been attained, for one reason, among others, that means for the removal of the dust coming from the kiln with the gases was not given proper attention.

The object of the present invention is to regenerate a portion of the stack-gas waste heat by preheating air, which may be used for the support of combustion in the kiln.

In the accompanying diagrammatic drawings, Figure 1 represents -a longitudinal section of a kiln and Fig. 2 a section of the kilnhousing, taken along the line A A of Fig. 1.

In the drawings, 1 is a rotary ldln having the header 2, the fuel-inlet 3, air-inlet 4, airblast connection 5, the housing and regenerative chamber 6, feeding-chute 7, hopper 8, and conveyor 9 for introducing the raw material into the kiln.

10 10 are partitions which act as dust-baf- At 11 are shown a series of vertical pipes, through which air is forced by means of the fan-blower 12.

13 is a stack having the damper 14.

15 and 16 are clean-out doors.

17 is a blower or exhauster which may be used, if desired, for the purpose of producing an induced draft. 18 is a flue connecting this ian with the stack 13.

19 is a conduit extending to the ian 20, by means of which products of combustion are entered into the gas-producers 21 21 through the twyers 22 22. The gas-producers have feed-hoppers 23 for the introduction oi fuel, water seals 24, gas-outlets 25, steam-blowers 26, and the steam-jets 27. The dampers or valves 28, 29, 30, 31, 32, 33, and 34 regulate the iiow of the gases through the various conduits above mentioned.

In the operation of this apparatus the fan 12 is caused to pass air through the regenerating-pipes 11 into the conduit 5 to the distributing-inlet 4. rlhe gas-producers 21 21 deliver gas through 3 into the kiln, where by mixture with the preheated air through 4 an intense and rapid combustion is effected.

` The ues 11 are 'shown in the accompanying diagrammatic drawings arranged vertically. Ihis is the most satisfactory arrangement, owing to the fact that dust cannot readily lodge on the pipes and prevent the absorption of heat from the stack-gases. A y

horizontal arrangement of these lues oi' course 1s also possible. When the iiues are made ofmetal-as, for instance, of cast-ironlit is often desirable to make the castings with corrugations which admit of greater heatingsurface per unit of length than would be secured Jfrom ordinary pipe. The air-blast may be drawn through the regenerating-hues by means of a fan-blast in the conduit 5'.

I do not limit myself to the exact form of construction herewith shown, as many modiiications oi this apparatus will be evident to one skilled in the art to which this invention appertains; neither do I limit myself to the use of gaseous fuel, as powdered coal or oil may also be used with my apparatus to advantage.

What I claim is- 1. Apparatus for making cement comprismeans 'at the lower end, a housing inclosing the upper end, spaced air-heating lues in said housing, a pipe connection delivering heated air from the'flues to the fuel-feeding means at the lower end of the kiln, means in said housing for causing a deposition of dust and means for permi tting the removal of dust from the housing.

2. Apparatus for making cement comprising an inclined rotary kiln, a housing inclosing the upper end, a blast gas-burner at the lower end, air-heating iiues in said housing, a pipe connection delivering heated air Jfrom the iues to the blast gas-burner, means in said housing to cause the deposition of dust :nd means for permitting the removal oi the ust.

3. Apparatus for making cement comprising an inclined rotary kiln, fuel-feeding means at the 1..'-Wer end of the kiln, a housing IOO l inclosingthe upper end, air-heating flues upper end, air-heating iiues in the housing,

dust settling and collecting means in the housing, and a pipe connection delivering heatedI air from the lues'into the fuel-feeding means.

5. Apparatus for making cement comprising a rotary kiln, a housing inclosing the upper end, fuel-feeding means at the lower end,

baffle-plates in the housing for causing a de osition of dust, air-heating iiues also in t e housing and spaced ap art to permit cleansing,

doors in the housing permitting access between the :[iues and a pipeconnection delivering heated air from the iiues into thel fuelfeeding means.

6. Apparatus for making cement comprising a rotary kiln, a housinginclosing the upper end, gas-firing means at the lower end, haine-plates in the housing causing a circui-` tous passage of wastekiln-gases therein 1and deposition of dust, *air-heating flues also in the housing between said bae -plates and spaced apart to permitcleansing, doors in the housing permitting access between'the lues, and a pipe connection deliveringlheated air from the iiues tothe gas-firing means.

7. Apparatus for making cement comprising a kiln, a dust-collecting housing for the gas-exitend of the kiln, air-heating'lues in the housing, a pipe connection from the iiues to the'other end of the kiln, a gas-producer delivering gas into the kiln near said pipe comiection, and a pipe connectionvfor delivsling-waste gases .from a point lieyondjsaid housing into the' gas-poducer.

Signed at New York city, in the county of 45 New York and State oi New York, thisSd day K of May, A. D. 1905.

' cARLEToN Ennis. f

y:Vlr-itnesses: i i I l WARREN E. DIXON, A. M. SENIOR. 

